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Author Question: The most striking and largest valley in the solar system is A) the Grand Canyon in Arizona. B) ... (Read 57 times)

cabate

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on: Jul 27, 2018
The most striking and largest valley in the solar system is
 
  A) the Grand Canyon in Arizona.
  B) Gwenivere on Venus.
  C) the Discovery Scarp of Mercury.
  D) Valles Marineris on Mars.
  E) Valhalla on Callisto.

Question 2

The critical temperature to initiate the proton-proton cycle in the cores of stars is:
 
  A) 3,000 K.
  B) 5,800 K.
  C) 2,300,000 K.
  D) 10 million K.
  E) 100 million K.


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Chou

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Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

D


cabate

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Reply 2 on: Jul 27, 2018
Excellent

nguyenhoanhat

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Reply 3 on: Yesterday
:D TYSM

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